JP6336178B1 - Rotor for rotating electrical machine for vehicles - Google Patents

Abstract

The present invention provides a rotor for an AC generator for a vehicle that can more easily realize positioning of a permanent magnet and suppress variation in performance. A rotor of a vehicular rotating electrical machine is wound around a bobbin 45 attached to first and second rotor cores 131 and 132 and the first and second rotor cores 131 and 132 via the bobbin 45. And the permanent magnet 40 disposed between the first and second claw-shaped magnetic poles. The bobbin 45 is provided with an accommodating portion 450 for enclosing the rotor winding 14 and an extending portion 451 extending in the radial direction from the accommodating portion 450, and the extending portion 451 of the bobbin 45 is permanent. The magnet 40 is positioned. [Selection] Figure 7

Description

  The present invention relates to a rotor of a vehicular rotating electrical machine such as an AC generator mounted on a vehicle.

  For example, in an AC generator mounted on a vehicle, a permanent magnet is interposed between the side surfaces of the claw-shaped magnetic pole in order to reliably transfer the magnetic flux between the Landell-type claw-shaped magnetic pole and the stator that constitute the rotor. A technique for preventing leakage of magnetic flux between the claw-shaped magnetic poles is known. Furthermore, a technique for preventing the permanent magnet from jumping out to the outside in the radial direction by a centrifugal force and being damaged is known.

  In Patent Document 1 below, a concave portion is provided in a disk portion of a pair of rotor cores constituting a rotor, and a hook portion is provided on an outer peripheral portion of a claw-shaped magnetic pole, and a permanent magnet is constrained by the concave portion and the hook portion. A configuration is disclosed. Patent Document 2 below discloses a configuration in which a groove is formed on the side surface of the rotor, and a material softer than the magnet is fitted between the outer peripheral surface of the magnet and the groove.

Japanese Patent No. 4694428 Japanese Patent No. 4250877

  In such a rotor of a vehicular rotating electrical machine, a permanent magnet is generally fixed by an adhesive layer such as an adhesive or a varnish. In the prior art as described above, a concave portion or a groove is provided in the claw-shaped magnetic pole for the purpose of restraining the permanent magnet until the adhesive layer is cured. However, such a recess or groove needs to be larger than the size of the permanent magnet in order to accommodate the permanent magnet. Therefore, a gap is generated between the recess or groove and the permanent magnet in the radial direction or the axial direction of the rotor, and the position of the permanent magnet varies by the gap. Since the magnetic flux exiting the rotor changes according to the position of the permanent magnet, the performance of the rotating electrical machine also varies due to the variation in the position of the permanent magnet.

  The present invention has been made in order to solve the above-described problems, and its object is to rotate a vehicle alternator that can more easily realize the positioning of a permanent magnet and suppress variation in performance. Is to provide a child.

  A rotor of a vehicular rotating electrical machine according to the present invention includes a first rotor core having a plurality of first claw-shaped magnetic poles protruding in the axial direction and spaced apart from each other in the circumferential direction, and a plurality of first claws. A second rotor core having a plurality of second claw-shaped magnetic poles projecting in the axial direction and spaced apart from each other in the circumferential direction so as to be located between the magnetic poles, and the first and second rotor cores The bobbin includes an attached bobbin, a rotor winding wound around the first and second rotor cores via the bobbin, and a permanent magnet disposed between the first and second claw-shaped magnetic poles. Is provided with an accommodating portion for enclosing the rotor windings and an extending portion extending in the radial direction from the accommodating portion, and the extending portion of the bobbin positions the permanent magnet.

  According to the rotor of the rotating electrical machine for a vehicle of the present invention, since the extended portion of the bobbin positions the permanent magnet, the positioning of the permanent magnet can be realized more easily and the variation in performance can be suppressed.

It is sectional drawing of the rotary electric machine by Embodiment 1 of this invention. It is a front view which shows the rotary electric machine of the state from which the cover of the control apparatus of FIG. 1 was removed. It is a side view which shows the rotor of FIG. It is a side view which shows the 1st and 2nd claw-shaped magnetic pole of FIG. It is a perspective view which shows the bobbin attached to the 1st and 2nd rotor core of FIG. It is BB sectional drawing of FIG. 4 before magnet insertion. It is BB sectional drawing of FIG. 4 after magnet insertion. It is CC sectional drawing of FIG. It is a perspective view which shows the bobbin used for the rotary electric machine by Embodiment 2 of this invention. FIG. 10 is a cross-sectional view of first and second rotor cores to which the bobbin of FIG. 9 is attached. It is explanatory drawing which shows the condition where the permanent magnet is positioned by the 1st and 2nd extension part of FIG. It is a perspective view which shows the permanent magnet assembly used for the rotary electric machine by Embodiment 3 of this invention. It is sectional drawing of the 1st and 2nd rotor iron core before the permanent magnet assembly of FIG. 12 is inserted. It is sectional drawing of the 1st and 2nd rotor core after the permanent magnet assembly of FIG. 12 is inserted. It is a perspective view which shows the bobbin used for the rotary electric machine 1 by Embodiment 4 of this invention. It is a side view which shows the 1st and 2nd rotor iron core to which the bobbin of FIG. 15 was attached. It is sectional drawing of the 1st and 2nd rotor core with which the bobbin of FIG. 15 was attached. It is explanatory drawing which shows the condition where the permanent magnet is positioned by the extension part of FIG. It is CC sectional drawing of FIG.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a cross-sectional view of a rotating electrical machine 1 according to Embodiment 1 of the present invention, showing a cross section viewed from the direction of the arrow along the line AA in FIG. FIG. 2 is a front view showing the rotating electrical machine 1 with the cover 38 of the control device 3 of FIG. 1 removed.

  A rotating electrical machine 1 shown in FIGS. 1 and 2 is a control device-integrated rotating electrical machine having a rotating electrical machine body 2 and a control device 3 mounted on the rotating electrical machine body 2. The rotating electrical machine 1 is mounted on, for example, a vehicle driven by an internal combustion engine. In the first embodiment, the rotating electrical machine 1 is configured as an AC generator motor with a brush (AC motor generator). In the following description, the same or corresponding parts are denoted by the same reference numerals in each drawing.

  The rotating electrical machine main body 2 includes a cylindrical stator 4, a rotor 5 that is disposed in the inner space of the stator 4 and is rotatable with respect to the stator 4, and a case that supports the stator 4 and the rotor 5. 6.

  The case 6 includes a front bracket 7 and a rear bracket 8 that sandwich the stator 4 at both axial ends thereof, and a plurality of fastening bolts 9 that fasten the front bracket 7 and the rear bracket 8 in a direction approaching each other. Yes. The front bracket 7 and the rear bracket 8 are made of metal. A plurality of intake holes are formed in the bottom portions of the substantially bowl-shaped front bracket 7 and rear bracket 8, and similarly, a plurality of exhaust holes are formed in both outer peripheral shoulders of the front bracket 7 and the rear bracket 8. ing.

  The stator 4 is a cylindrical stator core 10 sandwiched between the front bracket 7 and the rear bracket 8 and fastened by the fastening bolt 9 described above, and armature windings provided on the stator core 10. And the stator winding 11. In the first embodiment, the stator winding 11 constitutes an armature winding of the rotating electrical machine 1. The stator winding 11 is composed of one or a plurality of three-phase AC windings each having a star connection or a delta connection.

The rotor 5 includes a rotor shaft 12 which is arranged on the axis of the rotor 5, the first and second rotor core 13 1 is fixed to an intermediate portion in the axial direction of the rotor shaft _12, 13 ₂ and And the rotor winding 14 as a field winding surrounded by the first and second rotor cores 13 ₁ and 13 ₂ .

First and second rotor core ₁₃ 1, 13 ₂ is made of iron member is fixed to the rotor shaft 12. The first rotor core 13 ₁ is disposed in the front bracket 7 side and the second rotor core 13 ₂ is disposed on the rear bracket 8 side.

These first and second rotor cores 13 ₁ and 13 ₂ constitute a so-called claw pole type magnetic pole. The first rotor core 13 ₁ has a plurality of first claw-shaped magnetic pole 131 _1. The first claw-shaped magnetic pole 131 ₁ is projected in the axial direction of the rotor shaft 12 toward the first outer peripheral edge of the rotor core 13 ₁ to the rear bracket 8 side. Similarly, the second rotor core 13 ₂ has a plurality of second claw-shaped magnetic poles 131 _2. Second claw-shaped magnetic poles 131 ₂ is projected in the axial direction of the rotor shaft 12 toward the second outer peripheral edge of the rotor core 13 ₂ to the front bracket 7 side. The first and second claw-shaped magnetic poles 131 ₁ and 131 ₂ are respectively arranged at intervals in the circumferential direction. Each claw-shaped magnetic poles ₁₃₁ 1, 131 ₂ of the interval may be a uniform angular pitch. The second claw-shaped magnetic poles 131 ₂ are disposed so as to be positioned between the first claw-shaped magnetic pole 131 _1. In other words, ₂ the first and second rotor core ₁₃ 1, 13, first and second claw-shaped magnetic pole ₁₃₁ 1, 131 ₂ are disposed opposite to mesh with each other.

The ₂ first and second rotor core ₁₃ 1, 13, the rotor winding 14 is wound. Rotor winding 14 is arranged to be surrounded by the first and second rotor core ₁₃ 1, 13 _2.

The rotor shaft 12 passes through the front bracket 7 and the rear bracket 8 and is rotatably supported via a pair of bearings 15 provided on each of the front bracket 7 and the rear bracket 8. The outer peripheral portion of the rotor core 13 _1, 13 ₂ are opposed via a predetermined gap to the inner peripheral portion of the stator 4. Further, the axial ends of the rotor core 13 _1, 13 _2, a pair of cooling fans 16 for blowing to be rotated to the rotor 5 integrally is provided.

  A pulley 17 is fixed to the axial end of the rotor shaft 12 on the front bracket 7 side. A transmission belt (not shown) is wound around the pulley 17, and power can be exchanged between the rotating electrical machine 1 and the outside via the transmission belt. The rotating electrical machine 1 can be connected to a rotating shaft of an internal combustion engine (not shown) mounted on the vehicle via a transmission belt. Further, in the vicinity of the axial end of the rotor shaft 12 on the rear bracket 8 side, a rotational position detection sensor 18 that generates a signal corresponding to the rotation of the rotor shaft 12 and the rotor winding 14 are electrically connected. A pair of slip rings 19 is provided. These slip rings 19 are constituted by an annular conductive member surrounding the outer periphery of the rotor shaft 12.

  A pair of brushes 20 made of a conductive material are disposed at the outer peripheral position of each slip ring 19. The brush 20 is held by a brush holder 21 fixed to the rear bracket 8 and is urged by a pair of pressing springs 22 in a direction in contact with each slip ring 19. The brush 20 and the slip ring 19 are in sliding contact with the rotation of the rotor 5 and can supply a field current to the stator winding 11 via the brush 20 and the slip ring 19.

  The control device 3 adjusts the DC power from the two power module components 23 electrically connected to the stator winding 11 and an in-vehicle battery (not shown) as a DC power source as a field current. One field circuit unit 24 supplied to the rotor winding 14, one control circuit unit 25 for controlling the power module component 23 and the field circuit unit 24, and the power module component 23 and the field circuit A signal relay device 26 for transmitting and receiving control signals between the unit 24 and the control circuit unit 25 is provided. As will be described later, the control device 3 is fixed to an end portion in the axial direction of the rear bracket 8 and is covered with a cover 38 made of an insulating resin (see FIG. 1). Further, the control circuit unit 25 is provided with a connector 27 for external connection for transmitting / receiving signals to / from an external device (for example, an internal combustion engine control unit).

  The control circuit unit 25 includes a control board 251 having a control circuit, and the control board 251 is protected by a resin 252. A signal from the rotational position detection sensor 18 is transmitted to the control circuit unit 25 through the signal relay device 26, and a signal from an external device such as an internal combustion engine control unit is transmitted through the connector 27. The control circuit unit 25 performs switching control of the switching elements respectively provided in the field circuit unit 24 and the power module configuration body 23 based on information by these transmitted signals.

The field circuit unit 24 is composed of electronic components such as a switching element molded with a mold resin, and the switching element is subjected to switching control by the control circuit unit 25 to adjust the field current to the rotor winding 14. . The field circuit unit 24 is provided with a heat sink provided with cooling fins 241. The field current adjusted by the field circuit unit 24 is supplied to the rotor winding 14 to generate a DC magnetic field in the rotor winding 14. The magnetic flux generated by the DC magnetic field generated in the rotor winding 14 flows on the peripheral surface of the rotor 5 from the one rotor core 13 ₁ , 13 ₂ to the other rotor core 13 ₁ , 13 ₂ . In the meantime, it interlinks with the stator winding 11.

  The two power module structures 23 having the same configuration are each provided with a power module 30 described later provided with six switching elements constituting a power conversion circuit. The power conversion circuit configured by these switching elements operates as an inverter circuit that converts DC power from a battery (not shown) into AC power and supplies the AC power to the stator winding 11 or the stator winding. 11 operates as a converter circuit that converts AC power from DC to DC power, charges the battery, and supplies DC power to the in-vehicle device. The switching element 36 constituting the power conversion circuit is constituted by a semiconductor switching element such as a power transistor, a MOSFET, or an IGBT. The two power module constituting bodies 23 constitute a three-phase power conversion circuit corresponding one-to-one with two sets of armature windings.

  The signal relay device 26 is provided on the signal relay member 28 electrically connected to each of the power module component 23 and the field circuit unit 24, and is provided on the signal relay member 28, and is connected to the control circuit unit 25. And a signal relay connection portion 29. Transmission / reception of signals between the power module component 23 and the field circuit unit 24 and the control circuit unit 25 is performed via the signal relay device 26 configured as described above.

  Next, details of the rotor 5 according to Embodiment 1 of the present invention will be described.

FIG. 3 is a side view showing the rotor 5 of FIG. In FIG. 3, illustration of a permanent magnet 40 described later is omitted. Rotor 5, the first and second claw-shaped magnetic pole ₁₃₁ 1, 131 ₂ are configured to mate with each other. A gap is formed between the first and second claw-shaped magnetic poles 131 ₁ , 131 ₂ in the circumferential direction of the rotor 5. By disposing a permanent magnet 40 described later in the gap, it is possible to reliably transfer the magnetic flux between the first and second claw-shaped magnetic poles 131 ₁ , 131 ₂ and the stator 4.

FIG. 4 is a side view showing the first and second claw-shaped magnetic poles 131 ₁ and 131 ₂ of FIG. 3, and the first and second claw-shaped magnetic poles 131 ₁ and 131 ₂ and the permanent magnet 40 disposed therebetween. It is the simple figure which showed only. Between each claw-shaped magnetic poles ₁₃₁ 1, 131 _2, the permanent magnets 40 respectively are arranged. 4 is the front side where the pulley 17 (see FIG. 1) is assembled, and the lower direction in FIG. 4 is the rear side where the control device 3 (see FIG. 1) is assembled.

They claw-shaped magnetic pole ₁₃₁ 1, 131 flange portion 132 extending from the _second side in the circumferential direction ₁ and 132 ₂ are provided on the upper side surface of the claw-shaped magnetic poles ₁₃₁ 1, 131 _2. Permanent magnets 40, as the outer peripheral end face thereof a permanent magnet 40 along the inner peripheral surface of the flange portion 132 ₁ and 132 _2, is inserted into the space between the first and second claw-shaped magnetic pole ₁₃₁ 1, 131 ₂ Yes. These flanges 132 ₁ and 132 ₂ restrict the displacement of the permanent magnet 40 radially outward, and prevent the permanent magnet 40 from jumping out in the outer diameter direction due to centrifugal force.

FIG. 5 is a perspective view showing the bobbin 45 attached to the first and second rotor cores 13 ₁ and 13 ₂ of FIG. 1, and FIG. 6 is a cross-sectional view taken along line BB of FIG. 7 is a BB cross-sectional view of FIG. 4 after the magnet is inserted, and FIG. 8 is a CC cross-sectional view of FIG.

The first and second rotor core ₁₃ 1, 13 ₂ in FIG. 1, the rotor winding 14 is wound on the bobbin 45 shown in FIG. 5 is mounted (see FIG. 6). Bobbin 45 has been constituted of an insulating material, electrically insulating the first and second rotor core 13 _1, 13 ₂ and the rotor winding 14. The bobbin 45, a housing portion 450 for surrounding the rotor windings 14 when attached to the first and second rotor core ₁₃ 1, 13 ₂ as shown in FIG. 6, the housing portion 450 in the radial direction An extending portion 451 is provided. Extending portion 451 of the present embodiment is extended to between the second claw-shaped magnetic poles 131 ₂ (see FIG. 4).

  In the bobbin 45 of the first embodiment, the extending portion 451 extends radially outward from the rear side end portion of the accommodating portion 450. The extending portion 451 is provided with a pair of recesses 451a, and the permanent magnets 40 can be fitted into the recesses 451a, respectively.

As shown in FIG. 6, the permanent magnet 40 is inserted from the front side to the space between the first claw-shaped magnetic poles 131 ₁ circumferentially adjacent. An extension part 451 is located in the back in the insertion direction of the permanent magnet 40, and the tip of the permanent magnet 40 is fitted into the recess 451a. Thereby, the extended part 451 of the bobbin 45 positions the permanent magnet 40.

  More specifically, as shown in FIG. 5, the recess 451a has a back surface 451b, an upper surface 451c, a lower surface 451d, and a pair of side surfaces 451e. The back surface 451b is in contact with the axial end surface of the permanent magnet 40, whereby the permanent magnet 40 is positioned in the axial direction. The upper surface 451c and the lower surface 451d are in contact with the outer diameter side end surface and the inner diameter side end surface of the permanent magnet 40, whereby the radial positioning of the permanent magnet 40 is performed. Positioning of the permanent magnet 40 in the circumferential direction is performed by the pair of side surfaces 451 e coming into contact with the circumferential end surface of the permanent magnet 40. That is, in the bobbin 45 of the present embodiment, the surfaces 451b, 451c, 451d, and 451e of the recess 451a are in contact with the entire periphery of the tip of the permanent magnet 40, and the extended portion 451 of the bobbin 45 connects the tip of the permanent magnet 40. Restrained.

As shown in FIG. 8, an adhesive layer 60 for fixing the permanent magnet 40 is provided between the permanent magnet 40 and the first and second claw-shaped magnetic poles 131 ₁ and 131 ₂ . As described above, the extension part 451 of the bobbin 45 positions the permanent magnet 40, so that the positioning of the permanent magnet 40 can be realized more easily and the variation in performance can be suppressed.

  In addition, the structure shown in FIGS. 5-8 presupposes that all the permanent magnets 40 are inserted from the front side. However, if the permanent magnet 40 is inserted from the rear side, the extending portion 451 is disposed on the front side of the bobbin 45.

  According to such a rotor 5 of a vehicular rotating electrical machine, since the extended portion 451 of the bobbin 45 positions the permanent magnet 40, the positioning of the permanent magnet 40 can be realized more easily and the variation in performance is suppressed. be able to.

  Moreover, since the extension part 451 is in contact with the axial end surface of the permanent magnet 40 and performs the axial positioning of the permanent magnet 40, the positioning of the permanent magnet 40 can be realized more reliably.

  Furthermore, since the extending part 451 is in contact with both the outer diameter side end face and the inner diameter side end face of the permanent magnet 40 and positions the permanent magnet 40 in the radial direction, the positioning of the permanent magnet 40 can be realized more reliably. .

Embodiment 2. FIG.
FIG. 9 is a perspective view showing a bobbin 45 used in the rotating electrical machine 1 according to the second embodiment of the present invention, and FIG. 10 shows the first and second rotor cores 13 ₁ and 13 to which the bobbin 45 of FIG. is a cross-sectional view of _2, FIG. 11 is an explanatory diagram showing a situation where the permanent magnet is positioned by the first and second extending portions 451 and 452 of FIG. 10.

As shown in FIGS. 9 and 10, the bobbin 45 includes a housing portion 450 for enclosing the rotor winding 14, a first extending portion 451 disposed on the rear side of the housing portion 450, and a housing portion 450. And a second extending portion 452 disposed on the front side of the. The first and second extending portions 451 and 452 extend between the first and second claw-shaped magnetic poles 131 ₁ and 131 ₂ , respectively.

  The first extension part 451 has a recess 451a, similar to the extension part 451 described in the first embodiment. The second extending portion 452 is provided with a through hole 452a that passes through the second extending portion 452 in the axial direction. The cross-sectional shape of the through-hole 452a of the second extending portion 452 is substantially the same as the cross-sectional shape of the permanent magnet 40, and the permanent magnet 40 is positioned by fitting the permanent magnet 40 into the through-hole 452a. Is called.

  That is, in the configuration of the first embodiment, it has been described that the permanent magnet 40 is positioned by supporting only one end of the rear side extending portion 451. However, as in the second embodiment, the first and second rear and front sides are arranged. The permanent magnet 40 may be positioned by supporting both ends of both the second extending portions 451 and 452. Other configurations are the same as those of the first embodiment.

  The configuration shown in FIGS. 9 to 11 is a configuration in the case where the permanent magnet 40 is inserted from the front side. However, a through hole is provided in the first extending portion 451 on the rear side, and the second extending portion on the front side is provided. A recess may be provided in 452 so that the permanent magnet 40 can be inserted from the rear side.

  According to the rotor 5 of such a vehicular rotating electrical machine, since both the first and second extending portions 451 and 452 position the permanent magnet 40, the positioning of the permanent magnet 40 can be realized more reliably.

Embodiment 3 FIG.
FIG. 12 is a perspective view showing a permanent magnet assembly 400 used in the rotating electrical machine 1 according to Embodiment 3 of the present invention. The configuration of the first embodiment, the extending portion 451 is disposed on the rear side of the first claw-shaped magnetic poles 131 ₁ tip so as to avoid interference with the first claw-shaped magnetic pole 131 ₁ and the extended portion 451 ing. Therefore, in order to fit the tip of the permanent magnet 40 into the recess 451a of the extending portion 451, the permanent magnet 40 is elongated in the axial direction. This increases the volume of the magnet, increases the weight of the rotor, and may increase costs.

  In order to cope with such a problem, the permanent magnet assembly 400 shown in FIG. 12 is used in the third embodiment of the present invention. The permanent magnet assembly 400 is obtained by covering the permanent magnet 40 with a holding member 41 made of a nonmagnetic material. The permanent magnet 40 is exposed on the side surface of the permanent magnet assembly 400. A convex portion 411 is provided at the end of the holding member 41.

Figure 13 is a first and second rotor core ₁₃ 1, 13 cross-sectional view of a _second before the permanent magnet assembly 400 of FIG. 12 is inserted, FIG. 14 is a permanent magnet assembly 400 of FIG. 12 is inserted It is sectional drawing of the 1st and 2nd rotor iron cores 13 ₁ and 132 after a _second . As shown in FIGS. 13 and 14, the permanent magnet assembly 400 is inserted into the gap between the first claw-shaped magnetic pole 131 _1.

As particularly evident in FIG. 13, while the permanent magnets 40 of the permanent magnet assembly 400 has a length so as not to protrude from the first claw-shaped magnetic poles 131 ₁ of the tip, the convex portion 411 is first claw-shaped It protrudes rearward from the tip of the pole 131 _1. The convex portion 411 of the holding member 41 is fitted in the concave portion 451 a of the extending portion 451.

  The rear surface 451b of the recess 451a is in contact with the axial end surface of the projection 411 of the holding member 41, whereby the permanent magnet 40 is positioned in the axial direction. The upper surface 451c and the lower surface 451d of the concave portion 451a are in contact with the outer diameter side end surface and the inner diameter side end surface of the convex portion 411 of the holding member 41, whereby the permanent magnet 40 is positioned in the radial direction. Further, the permanent magnet 40 is positioned in the circumferential direction by the pair of side surfaces 451e of the concave portion 451a being in contact with the circumferential end surface of the convex portion 411 of the holding member 41. Other configurations are the same as those of the first embodiment. The configuration of the third embodiment may further include a second extending portion 452 as in the second embodiment.

  According to the rotor 5 of such a vehicular rotating electrical machine, the extension portion 451 is in contact with the axial end surface of the holding member 41 and positions the permanent magnet 40 in the axial direction. Positioning of the permanent magnet 40 can be realized while suppressing the length of 40.

  Furthermore, since the extended portion 451 is in contact with both the outer diameter side end face and the inner diameter side end face of the holding member 41 and performs the radial positioning of the permanent magnet 40, the length of the axial permanent magnet 40 is suppressed. Meanwhile, the positioning of the permanent magnet 40 can be realized.

Embodiment 4 FIG.
FIG. 15 is a perspective view showing a bobbin 45 used in the rotating electrical machine 1 according to Embodiment 4 of the present invention, and FIG. 16 shows the first and second rotor cores 13 ₁ and 13 to which the bobbin 45 of FIG. is a side view showing a _2, 17 is a first and second rotor core ₁₃ 1, 13 ₂ of the cross-sectional view bobbin 45 is attached in FIG. 15, the extending portion 451 of FIG. 18 FIG. 17 It is explanatory drawing which shows the condition where the permanent magnet 40 is positioned, and FIG. 19 is CC sectional drawing of FIG.

  According to the configuration of the third embodiment, the volume of the permanent magnet 40 can be reduced, but there is a disadvantage that the holding member 41 is required, the number of parts is increased, and the manufacturing process is increased. The configuration of the fourth embodiment is a configuration for reducing the volume of the permanent magnet 40 by a method different from that of the third embodiment.

As shown in FIG. 15, the concave portion 451 a of the extending portion 451 of the bobbin 45 of the fourth embodiment has a U shape that does not have the side surface 451 e (see FIG. 5). That is, the concave portion 451a of the fourth embodiment is configured by the back surface 451b, the upper surface 451c, and the lower surface 451d. By omitting the side surface 451e of the recess 451a, the extending portion 451 of the fourth embodiment is made compact in the circumferential direction as compared with the extending portion 451 of the first embodiment. Therefore, as shown in FIG. 16, the extending portion 451 of the fourth embodiment, while avoiding interference with the first claw-shaped magnetic pole 131 _1, disposed between the first claw-shaped magnetic pole 131 ₁ tip can do.

As shown in FIGS. 17 and 18, by the extending portion 451 is disposed between the first claw-shaped magnetic pole 131 _1, a short permanent magnets 40 in the axial direction as compared with the configuration of the first embodiment Even if it is used, the positioning of the permanent magnet 40 can be performed by the recess 451a. Thereby, the volume of the permanent magnet 40 can be reduced without using the holding member 41 described in the third embodiment. In addition, since the recessed part 451a does not have the side surface 451e, the permanent magnet 40 is not positioned in the circumferential direction. However, since the position of the permanent magnet 40 in the circumferential direction has less influence on the performance of the rotating electrical machine 1 compared to the radial direction and the axial direction, there is no major problem in that the permanent magnet 40 is not positioned in the circumferential direction. The configuration of the fourth embodiment may further include a second extending portion 452 as in the second embodiment.

In such a rotor 5, since the extending portion 451 is disposed between the first claw-shaped magnetic pole 131 ₁ tip can be avoided to increase the permanent magnet 40 in the axial direction, the volume of the permanent magnet 40 Can be reduced.

1: rotating electric machine, 2: rotating electric machine main body, 5: rotor, 13 ₁ , 13 ₂ : first and second rotor cores, 131 ₁ , 131 ₂ : first and second claw-shaped magnetic poles, 14: rotor Winding, 40: Permanent magnet, 41: Holding member, 45: Bobbin, 450: Storage part, 451, 452: Extension part

Claims (7)

A first rotor core having a plurality of first claw-shaped magnetic poles projecting in the axial direction at intervals in the circumferential direction;
A second rotor core having a plurality of second claw-shaped magnetic poles protruding in the axial direction and spaced apart from each other in the circumferential direction so as to be positioned between the plurality of first claw-shaped magnetic poles;
Bobbins attached to the first and second rotor cores;
A rotor winding wound around the first and second rotor cores via the bobbin;
A permanent magnet disposed between the first and second claw-shaped magnetic poles,
The bobbin is provided with an accommodating portion for enclosing the rotor winding, and a plurality of extending portions extending in a radial direction from the accommodating portion,
The extension of the bobbin positions the permanent magnet. A rotor of a vehicular rotating electrical machine. The rotor of the rotating electrical machine for a vehicle according to claim 1, wherein the extending portion is in contact with an axial end surface of the permanent magnet and performs positioning of the permanent magnet in the axial direction. The extension portion is in contact with both an outer diameter side end face and an inner diameter side end face of the permanent magnet, and performs positioning in the radial direction of the permanent magnet. A rotor of a rotating electrical machine for a vehicle. At least a part of the permanent magnet is covered by a holding member made of a non-magnetic material;
The rotor of the rotating electrical machine for a vehicle according to claim 1, wherein the extending portion is in contact with an axial end surface of the holding member and performs axial positioning of the permanent magnet. At least a part of the permanent magnet is covered by a holding member made of a non-magnetic material;
The extension portion is in contact with both the outer diameter side end face and the inner diameter side end face of the holding member, and performs positioning of the permanent magnet in the radial direction. A rotor of a rotating electrical machine for a vehicle. The extension portion includes a first extension portion extending from one side of the housing portion in the axial direction and a second extension extending from the other side of the housing portion in the axial direction. Part and
Both the said 1st and 2nd extension parts have positioned the said permanent magnet. The rotor of the rotary electric machine for vehicles as described in any one of Claim 1- Claim 5 characterized by the above-mentioned. The vehicle according to any one of claims 1 to 6, wherein at least a part of the extending portion is disposed between tips of the first claw-shaped magnetic poles in the axial direction. Rotor for rotating electrical machines.

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